package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.xiaoymin.knife4j.core.util.CollectionUtils;
import com.sky.WebSocket.WebSocketServer;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderSrevice;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class OrderSrevicelmpl implements OrderSrevice {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingChartMapper shoppingChartMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WebSocketServer webSocketServer;


    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //1.处理各种业务异常（地址簿为空，购物车数据为空）
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if(addressBook==null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        //查询购物车
        ShoppingCart shoppingCart=new ShoppingCart();
        shoppingCart.setId(BaseContext.getCurrentId());
        List<ShoppingCart> list = shoppingChartMapper.list(shoppingCart);
        if(list==null){
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //2.像订单表插入一条数据
        Orders orders=new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(orders.UN_PAID);
        orders.setStatus(orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(BaseContext.getCurrentId());
        orders.setAddress(addressBook.getProvinceName()+addressBook.getDistrictName()+addressBook.getDetail());
        orderMapper.insert(orders);


        List<OrderDetail> orderDetailList=new ArrayList<>();
        //3.向订单明细表插入n条数据（一个订单对应多条明细）
        for (ShoppingCart cart : list) {  //遍历购物车
            //每次遍历都是一条订单明细
            OrderDetail orderDetail=new OrderDetail();
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(orders.getId());//设置当前订单明细对应的订单id
            orderDetailList.add(orderDetail);
        }
        //批量插入
        orderDetailMapper.insert(orderDetailList);
        //4.清空当前用户购物车
        shoppingChartMapper.deleteById(orders.getId());
        // 5.封装VO返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())   //订单id
                .orderTime(orders.getOrderTime()) //下单时间
                .orderNumber(orders.getNumber())  //订单号
                .orderAmount(orders.getAmount())  //订单金额
                .build();

        return orderSubmitVO;
    }

    /**
     * 订单支付
     * @param ordersPaymentDTO
     * @return
     */
    @Override
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

//            //调用微信支付接口，生成预支付交易单
//            JSONObject jsonObject = weChatPayUtil.pay(
//                    ordersPaymentDTO.getOrderNumber(), //商户订单号
//                    new BigDecimal(0.01), //支付金额，单位 元
//                    "苍穹外卖订单", //商品描述
//                    user.getOpenid() //微信用户的openid
//            );
        JSONObject jsonObject=new JSONObject();
        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        paySuccess(ordersPaymentDTO.getOrderNumber());

        return vo;
    }
    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */

    @Override
    public void paySuccess(String outTradeNo) {
        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        //通过websocket向客户端浏览器推送消息()JSON
        Map map =new HashMap<>();
        map.put("type",1);  //1:来单提醒   2：客户催单
        map.put("orderId",ordersDB.getId());
        map.put("content","订单号:"+outTradeNo);

        String jsonString = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);
    }
    /**
     * 历史订单查询(分页查询)
     * @param
     * @return
     */
    @Override
    public PageResult pageQuery4User(int page, int pageSize, Integer status) {
        // 设置分页
        PageHelper.startPage(page, pageSize);

        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        // 分页条件查询
        Page<Orders> ordersPage = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList();

       if(ordersPage!=null && ordersPage.getTotal()>0){
           for (Orders orders : ordersPage) {
             Long orderId =  orders.getId();  //订单id
               //查询订单明细表
            List<OrderDetail> orderDetailList =  orderDetailMapper.getByOrderId(orderId);

               OrderVO orderVO =new OrderVO();
               BeanUtils.copyProperties(orders,orderVO);
               orderVO.setOrderDetailList(orderDetailList);
               list.add(orderVO);
           }
       }

        return new PageResult(ordersPage.getTotal(),list);
    }

    /**
     * 查询订单详情
     * @param id
     * @return
     */
    @Override
    public OrderVO select(Long id) {
        // 根据id查询订单
       Orders orders = orderMapper.selectById(id);
        // 查询该订单对应的菜品/套餐明细
       List <OrderDetail>  orderDetail = orderDetailMapper.getByOrderId(orders.getId());
        // 将该订单及其详情封装到OrderVO并返回
       OrderVO orderVO=new OrderVO();
       BeanUtils.copyProperties(orders,orderVO);
       orderVO.setOrderDetailList(orderDetail);
        return orderVO;
    }

    /**
     * 取消订单
     * @param id
     */
    @Override
    public void cleanOrder(Long id) {

        // 根据id查询订单
        Orders ordersDB = orderMapper.selectById(id);
        // 校验订单是否存在
        if(ordersDB==null){
            throw  new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);

    }

    /**
     *再来一单（将一个订单中的菜品信息重新添加到当前用户的购物车中）
     * @param id
     */
    @Override
    public void repetition(Long id) {
        // 查询当前用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
            // collect(Collectors.toList()) 将所有转换后的 ShoppingCart 对象收集到一个新的 List<ShoppingCart> 中。
        }).collect(Collectors.toList());

        // 将购物车对象批量添加到数据库
        shoppingChartMapper.insertBatch(shoppingCartList);
    }




//*************************************************************************管理端*********************************************
    /**
     * 订单搜索
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult list(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(), orderVOList);
    }

    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);

                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
        }

    /**
     * 查询订单详情
     * @return
     */
    @Override
    public OrderVO selectOrder(Long id) {
       Orders orders = orderMapper.selectById(id);
      List<OrderDetail> orderDetail = orderDetailMapper.getByOrderId(id);
      OrderVO orderVO = new OrderVO();
      BeanUtils.copyProperties(orders,orderVO);
      orderVO.setOrderDetailList(orderDetail);
        return orderVO;
    }

    /**
     * 各个状态的订单数量统计
     * @return
     */
    @Override
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    /**
     * 接单
     * @param  ordersConfirmDTO
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = new Orders();
        orders.setId(ordersConfirmDTO.getId());
        orders.setStatus(Orders.CONFIRMED);

        orderMapper.update(orders);
    }

    /**
     * 拒单
     * @param ordersRejectionDTO
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.selectById(ordersRejectionDTO.getId());

        // 订单只有存在且状态为2（待接单）才可以拒单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);

    }

    /**
     * 取消订单
     * @param ordersCancelDTO
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.selectById(ordersCancelDTO.getId());
        // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 派送订单
     * @param id
     */
    @Override
    public void delivery(Long id) {
       Orders ordersDB = orderMapper.selectById(id);

       Orders orders =new Orders();
       orders.setId(id);
       orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orders);
    }

    /**
     * 完成订单
     * @param id
     */
    @Override
    public void complete(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.selectById(id);

        // 校验订单是否存在，并且状态为4
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());
        orderMapper.update(orders);

    }

    /**
     * 催单
     * @param id
     */
    @Override
    public void reminder(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.selectById(id);

        // 校验订单是否存在，并且状态为2
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //通过websocket向客户端浏览器推送消息()JSON
        Map map =new HashMap<>();
        map.put("type",2);  //1:来单提醒   2：客户催单
        map.put("orderId",ordersDB.getId());
        map.put("content","订单号:"+ordersDB.getNumber());

        String jsonString = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);
    }

}

